I did the core plan on weigthwatchers, lost 35lb from jan to june I exercised 3 times a week (swimming/ areobics or aquafit) and just made more of an effort to move around more in general. I basically lived on porrige, ryvita, veg, fruit, yogurt and chicken and potatoes.
I haven't put weight back on and I don't plan to, i'm still weighing about once a month to check i'm not piling it all back on. I really would urge you to start today, I feel fabulous and I get compliments all the time, i'm healthier, fitter and a lot more confident. I'm so much happier now.
I did go to meetings once a week for 6 months which sounds like ages but it wasn't really and I really enjoyed the exercise once I got into it, I really like having an hour or two of peace swimming but now I've lost the weight I feel guilty if I go more than once a week, i'm still going to aquafit once a week which is good.
Btw I was 13.13 when I started my weightloss mission at the start of 2006 i think, I had a break for a year when I got to 11.7 stone then put half a st on over xmas 2007 then joined ww and finally reached my goal weight 9.7. I wish I hadn't had a break and had done it sonner!